/Engine/Source/Runtime/Engine/Classes/GameFramework/CharacterMovementComponent.h
FindFloor
virtual void ComputeFloorDist ( const FVector & CapsuleLocation, float LineDistance, float SweepDistance, [FFindFloorResult](API\Runtime\Engine\FFindFloorResult) & OutFloorResult, float SweepRadius, const [FHitResult](API\Runtime\Engine\Engine\FHitResult) * DownwardSweepResult ) const